This work-around does solve the issue on my Dell Mini 9:
$ gconftool-2 --type bool --set /apps/gnome-power-manager/general/use_time_for_policy false
This work-around does solve the issue on my Dell Mini 9:
$ gconftool-2 --type bool --set /apps/gnome- power-manager/ general/ use_time_ for_policy false